J.C. Cooper reviews Reverend Sidney Spencer’s latest work on Mysticism. The reviewer claims that it “is not only eminently readable for the layman, but is written in a scholarly manner; is well documented, and has an excellent bibliography. The book shows a total lack of bias, with a sympathetic understanding of the traditions of the East and every aspect of mysticism in the West.” The review includes the history of mysticism and an examination of the influence mysticism has had on the great world religions.